计算 attack 判定

// Calculate if the Viking is attacking and nearby
if ((vikingState == kStateAttacking) 
        && (CGRectIntersectsRect([self adjustedBoundingBox],vikingBoudingBox))) 
{
   if (characterState != kStateTakingDamage) {
        // If RadarDish is NOT already taking Damage
            [self changeState:kStateTakingDamage];
            return;
   }
}